Question 8 :
If the HCF of two numbers is 1, then they are called as ?
Question 10 :
Sum of first three prime numbers which end at 3 is: 
Question 15 :
If the last two digits of a number is $00$, then it is exactly divisible by _____.<br/>
Question 18 :
The number which have more than two factors is called _____. 
Question 19 :
Which of the following numbers are divisible by 2 but not by 4?<br>
Question 21 :
By Goldbach's conjecture, every even number greater than 4 can be expressed as a sum of
Question 26 :
If the last two digits of a number is divisible by $4$, the number is also divisible by ____.<br/>
Question 28 :
What is the sum of the least prime number and the greatest negative even integer?
Question 32 :
A number that has $0, 2, 4, 6$ or $8$ in its ones place is divisible by ________.<br/>
Question 34 :
For some integer m, every even integer is of the form of __.<br/>
Question 37 :
The total number of prime numbers between $120$ and $140$ is<br/>
Question 41 :
What is the least positive integer that is the product of $3$ different prime numbers greater than $2$?
Question 43 :
Which of the following numbers are co-prime?<br/>a) $18$ and $35$ <br/>b) $15$ and $37$ <br/>c) $30$ and $415$<br/>d) $17$ and $68$<br/>e) $216$ and $215$<br/>f) $81$ and $16$
Question 46 :
If the sum of digits of a number is divisible by three then the number is always divisible by
Question 49 :
The sum of prime numbers, out of the numbers $17, 8, 21, 13, 41, 2, 27, 31, 51$ is:
Question 53 : The number $10$ has four factors: $1,2, 5$ and $10$. The table below lists the number of factors for some numbers<br/><table class="wysiwyg-table"><tbody><tr><td>Numbers</td><td>Number of factors</td></tr><tr><td>$21$</td><td>$4$</td></tr><tr><td>$23$</td><td>$2$</td></tr><tr><td>$25$</td><td>$3$</td></tr><tr><td>$27$</td><td>$4$</td></tr><tr><td>$29$</td><td>$2$</td></tr></tbody></table>From this, we can say that the number of prime numbers between $20$ and $30$ is:<br/>
Question 54 :
Choose the composite numbers from the following numbers $87, 67, 45, 34, 23, 27, 33$.
Question 58 :
How many of the prime factors of $30$ are greater than $2$? 
Question 60 :
Which of the following is a pair of co-prime numbers ?
Question 61 :
A student was asked to find the sum of all the prime numbers between $10$ and $40.$He found the sum as $180.$Which of the following statements is true?
Question 62 :
A number is divisible by 4 if the number formed by the digits in ............. places is divisible by 4
Question 63 :
A number is divisible by $4$, if the number formed by the digits in ______ places is divisible by $4.$<br/>
Question 66 :
If $abc$ is a three digit number, then the number $abc-a-b-c$ is divisible by
Question 67 :
Among the following, which is the largest $3$ digit number exactly divisible by $2$?<br/>
Question 70 :
Which of the following is a pair of twin-prime number ?
Question 72 :
The largest number which always divides the sum of any pair of consecutive odd numbers is
Question 74 :
<span>Among the following numbers, how many nu</span><span>mbers are divisible by $4$?</span><br/><span>$12, 476, 308, 201, 23, 368$</span><br/>
Question 76 : <div>(i) Every prime number is odd.</div><div>(ii) The product of any two prime numbers is odd.</div><div><span>Which of the above statements(s) is/are correct? </span><br/></div>
Question 77 :
A number is divisible by $9$, if the sum of the digits of the number is divisible by _______ .<br/>
Question 78 :
Mark the correct alternative of the following.<br>The smallest number which is neither prime nor composite is?<br>
Question 80 :
Which one of the following is the largest prime number of three digits?
Question 84 :
Among the following numbers, number which is divisible by $2$ is<br/>
Question 85 :
Consider the following statements:<br/>A. The sum of two prime numbers is a prime number. <br/>B. The product of two prime numbers is a prime number. <br/>Which of these statements is/are correct ?
Question 91 :
Which of the following pair of numbers are $\text{relatively prime}$ :-
Question 92 :
If there are $12$ girls and $10$ boys in a class, then can we say that the total number of students in that class is even?
Question 93 :
Among the following numbers, how many numbers are divisible by $4$?<br/>$124, 118, 280, 314, 512$<br/>
Question 94 :
Mark the correct alternative of the following.<br>Which of the following is a prime number?<br>
Question 95 :
A $3$-digit number 'cba' is divisible by $9$ if _____ .
Question 98 :
How many numbers between $9$ and $54$ are exactly divisible by $9$ but not by $3$
Question 100 :
How many numbers from 1 to 100 are there each of which is not only exactly divisible by 4 but also has 4 as a digit ? <br>
Question 101 :
The numbers which have more than two factors are called ______.
